In the fictional BattleTech universe, New Avalon is the capital world of both the Federated Suns and, at other periods in BattleTech's history, the Federated Commonwealth. The world is also the hereditary landhold of the ruling House Davion. New Avalon is famous for its high agricultural output.
New Avalon is home to the New Avalon Institute of Science, the preeminent scientific research university in known space. NAIS also home of the College of Military Sciences, one of the most prestigious military academies in the Inner Sphere. It is also home to Albion Military College.
While the agricultural products of New Avalon are extremely important, New Avalon is also home to Achernar BattleMechs and Corean Enterprises, two companies that own BattleMech-producing factories.
War again came to New Avalon during the FedCom Civil War on two separate occasions. The first occurred when members of the 1st Davion Guards, led by Marshal Bishop Sortek, resisted Archon Katherine's rule. Though they were defeated; Duke Tancred Sandoval, Field Marshal Ardan Sortek, and Prince Victor landed within a short time span of each other to ultimately defeat Katherine in early 3067. 
War came one more time to New Avalon during the Word of Blake Jihad. Still reeling from the destruction wrought by the FedCom Civil War, the Word of Blake assaulted New Avalon in January 3068 with WarShips and divisions of troops. It was during this Third Battle of New Avalon that Corean Enterprises debuted their new 'Mech, the Legionnaire.